TW341629B - Low drag fan assembly - Google Patents

Low drag fan assembly

Info

Publication number
TW341629B
TW341629B TW086107931A TW86107931A TW341629B TW 341629 B TW341629 B TW 341629B TW 086107931 A TW086107931 A TW 086107931A TW 86107931 A TW86107931 A TW 86107931A TW 341629 B TW341629 B TW 341629B
Authority
TW
Taiwan
Prior art keywords
blade members
ring member
percent
opening
diameter
Prior art date
Application number
TW086107931A
Other languages
Chinese (zh)
Inventor
T Sorensen Bradford
Original Assignee
Smc Marketing Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Smc Marketing Corp filed Critical Smc Marketing Corp
Application granted granted Critical
Publication of TW341629B publication Critical patent/TW341629B/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/088—Ceiling fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A low drag fan assembly comprising: (a) a circular array of fan blade members; (b) a ring member supportively connecting the blade members about a fan axis, respective end extremities of at least a majority of the blade members defining an inside diameter D1 and an outside diameter D2 of the array, the blade members being oriented for producing a primary axial fluid flow between the diameters D1 and D2 in response to rotation of the ring member, D1 being not less than 50 percent of D2, the blade members having a combined projected area between the diameters D1 and D2 in the plane of the diameter D2 and an associated average projected area density .delta.; (c) the blade members in combination with the ring member defining a generally circular opening about the fan axis, the opening having a diameter D0 being not less than 90 percent of D1, at least an annular margin portion of the opening outside 75 percent of D0 being obstructed at an average projected area density γ not more than 5 percent of the density δ; and (d) means for rotatably supporting the ring member on the fan axis, whereby, when the ring member is being rotated for producing the primary axial flow, a secondary axial flow is produced within the opening, the secondary axial flow being unimpeded by blade members, a double toroid circulation pattern being produced in the room.
TW086107931A 1996-06-14 1997-06-10 Low drag fan assembly TW341629B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/663,714 US5860788A (en) 1996-06-14 1996-06-14 Low drag fan assembly

Publications (1)

Publication Number Publication Date
TW341629B true TW341629B (en) 1998-10-01

Family

ID=24662990

Family Applications (1)

Application Number Title Priority Date Filing Date
TW086107931A TW341629B (en) 1996-06-14 1997-06-10 Low drag fan assembly

Country Status (3)

Country Link
US (1) US5860788A (en)
CN (1) CN1076446C (en)
TW (1) TW341629B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7396212B1 (en) 1998-04-07 2008-07-08 University Of Central Florida Research Foundation, Inc. High efficiency twisted leaf blade ceiling fan
US6884034B1 (en) * 1998-04-07 2005-04-26 University Of Central Florida Enhancements to high efficiency ceiling fan
US7210910B1 (en) * 1998-04-07 2007-05-01 Research Foundation Of The University Of Central Florida, Inc. Enhancements to high efficiency ceiling fan
IL141628A0 (en) 1998-08-27 2002-03-10 Bostan Nicolae Gyrostabilized self-propelled aircraft
US6244821B1 (en) * 1999-02-19 2001-06-12 Mechanization Systems Company, Inc. Low speed cooling fan
US6682308B1 (en) 2002-08-01 2004-01-27 Kaz, Inc. Fan with adjustable mount
US6939108B2 (en) * 2003-01-06 2005-09-06 Mechanization Systems Company, Inc. Cooling fan with reinforced blade
JP2005144610A (en) * 2003-11-17 2005-06-09 Fanuc Ltd Sensor cable wiring processing structure
US7520466B2 (en) * 2005-03-17 2009-04-21 Nicolae Bostan Gyro-stabilized air vehicle
US7955055B1 (en) 2006-04-14 2011-06-07 Macroair Technologies, Inc. Safety retaining system for large industrial fan
US7726945B2 (en) * 2007-02-08 2010-06-01 Rite-Hite Holding Corporation Industrial ceiling fan
US8961109B2 (en) * 2007-10-04 2015-02-24 Bronswerk Heat Transfer B.V. Fan
US8579588B1 (en) 2009-04-29 2013-11-12 Macroair Technologies, Inc. Hub assembly for a large cooling fan
BRPI1012266A2 (en) * 2009-06-28 2016-04-05 Balmuda Inc axial flow fan.
UA107094C2 (en) 2009-11-03 2014-11-25 CENTRAL CEILING FAN
US8842000B2 (en) 2012-07-17 2014-09-23 4Front Engineered Solutions, Inc. Fire control systems
US9874214B2 (en) 2014-01-28 2018-01-23 4Front Engineered Solutions, Inc. Fan with fan blade mounting structure
US9726192B2 (en) 2015-03-31 2017-08-08 Assa Abloy Entrance Systems Ab Fan blades and associated blade tips
CN106225033B (en) * 2016-07-22 2018-11-06 宁波方太厨具有限公司 A kind of blower fan structure and range hood forming artificial spout
CN106051866B (en) * 2016-07-22 2018-11-06 宁波方太厨具有限公司 A kind of wind turbine and range hood forming artificial spout

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2295451A (en) * 1942-09-08 Fan mounting
US551196A (en) * 1895-12-10 Track-bearing
US330937A (en) * 1885-11-24 Swinging gate
US340514A (en) * 1886-04-20 Ramie-machine
US759167A (en) * 1904-02-27 1904-05-03 Arthur C Eastwood Friction driving mechanism.
FR391894A (en) * 1907-09-09 1908-11-11 Francois Hennebique Air thruster
US1222837A (en) * 1916-03-20 1917-04-17 Elbert R Winslow Portable electrical device.
US1462151A (en) * 1922-05-18 1923-07-17 James M Seymour Multiple propeller fan
US1699201A (en) * 1928-11-27 1929-01-15 Edwin F Guth Fan
US2366142A (en) * 1943-07-14 1944-12-26 Allis Chalmers Mfg Co Blade shrouding
US2790596A (en) * 1953-08-06 1957-04-30 Leo M Stirling Dual fan construction
GB860564A (en) * 1956-08-17 1961-02-08 Scientaire Ltd Ventilation system and extractor fan therefor
US3069135A (en) * 1957-10-03 1962-12-18 Gen Motors Corp Vane ring assembly
US3603700A (en) * 1969-05-19 1971-09-07 Michael Eskeli Rotating circular wing
US3728044A (en) * 1970-06-29 1973-04-17 Hitachi Ltd Turbine rotor
US4064427A (en) * 1975-08-12 1977-12-20 Hansen Mfg. Co. Of Florida, Inc. Safety guard and light fixture attachment for ceiling fans
US4020565A (en) * 1975-10-28 1977-05-03 Steffen Sylvester L Draft inducing roof for storage structures
US4684817A (en) * 1985-03-11 1987-08-04 Goldwater John M Valvular sail power plant
US4750863A (en) * 1987-06-11 1988-06-14 G & H Enterprises Fan shroud filter
CN1015488B (en) * 1988-04-09 1992-02-12 赤石金属工业株式会社 Fan of cylindrical rotor with multiple-blades
GB2263943B (en) * 1992-01-29 1996-05-08 Hunter Fan Co Ceiling fan
US5342167A (en) * 1992-10-09 1994-08-30 Airflow Research And Manufacturing Corporation Low noise fan
US5591004A (en) * 1995-04-06 1997-01-07 Aylor; Elmo E. Turbine support and energy transformation
US5632599A (en) * 1996-06-03 1997-05-27 Prime Energy Corporation Turbine with circumferential support and stationary pressure release means

Also Published As

Publication number Publication date
CN1172217A (en) 1998-02-04
US5860788A (en) 1999-01-19
CN1076446C (en) 2001-12-19

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